Are you suggesting that driving around with 2 cars, one towing the other, will double the range?
Moving 2 cars together takes almost double the power. The aerodynamic drag can decrease slightly — work on semi trucks in close convoy formation suggests maybe 10-20%.
No, you have double the range by having two cars for less than 100k. I’m saying at least at this point you at least have a chance at using batteries to recharge batteries.